Steam generator and steam generation system based on line focusing solar heat collection

Abstract

The invention discloses a steam generator and a steam generation system based on line focusing solar heat collection. The steam generator comprises a cavity absorber and a reflector array, wherein the cavity absorber is provided with a shell, one face, facing directly to the reflector array, of the shell is provided with a square opening, heat absorption tube bundles forming to rows are disposed in the shell, the two rows of the heat absorption tubes form two waists of an isosceles triangle using the square opening as the bottom edge, the adjacent heat absorption tubes contact with each other, the two rows of the heat absorption tubes form a V-shaped tube panel facing directly to the square opening, and two ends of the heat absorption tubes converge into main tubes serving as the fluid inlets and outlets of the cavity absorber. The steam generator has the advantages that water is used of heat collection circulation medium, steam is generated through solar heat collection, the generated steam can be used for power generation, refrigeration or life heat supply. The steam generation system comprises multiple steam generators which are connected parallelly, serially or in a way combining parallel connection or serial connection.

Description

technical field [0001] The invention relates to the field of solar energy utilization, in particular to a steam generator and a steam generation system based on line-focused solar heat collection. Background technique [0002] As an inexhaustible source of energy that is also ecologically pure and does not change the fuel balance on the earth, solar energy has the advantages of large total energy and easy realization of decentralized utilization. However, conventional solar thermal utilization can only be used in low-temperature thermal applications, such as household solar water heaters, low-temperature hot water circulation systems, etc. The temperature of the working fluid is low, which is difficult to meet the needs of industrial thermal energy and solar thermal power generation, and its application is greatly restricted. [0003] The line-focusing cavity absorber is the part responsible for absorbing solar radiation and converting it into heat energy in the line-focusin...

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Problems solved by technology

In this way, it is necessary to add a set of heat exchange equipment and a circulation loop; more importantly, due to the existence of the heat exchange temperature difference of the heat exchanger, the heat transfer oil needs to be heated to a temperature much higher than that of the steam, which affects the heat collector. The design puts forward higher requirements; at the same time, heat loss is inevitable in the heat transfer process

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